POINT MUGU, CA · Ventura County
U.S.N., SAN NICOLAS ISLAND Water System
Consumer Confidence Report status
U.S.N., SAN NICOLAS ISLAND must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.
As of August 1, 2026, EPA's federal records show no open violations for U.S.N., SAN NICOLAS ISLAND.
Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 2026. This is a record-keeping and public-information tool — it does not replace California’s official records. Always confirm current status with California before making decisions based on this information.
System facts
- System ID (PWSID)
- CA5610702
- System type
- Community Water System
- Population served
- 254
- Service connections
- 106
- Ownership
- federal government
- Water source
- surface water (rivers, lakes, or reservoirs)
U.S.N., SAN NICOLAS ISLAND is one of 3,951 community water systems in California in the 500 or fewer people size category, serving 254 people from surface water.
As of August 1, 2026, its federal record holds 2 entries between 2003 and 2005, all of which EPA lists as closed. Nothing has been added since 2005.
Of the 2, 1 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves the Stage 1 Disinfectants and Disinfection Byproducts Rule and the Total Coliform Rules.
Violation history
Maximum Contaminant Level Violation, Average
Health-basedTTHM
October 1, 2005 – December 31, 2005
ResolvedMonitoring, Routine Major (TCR)
—Coliform (TCR)
July 1, 2003 – July 31, 2003
Resolved
Resolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| October 1, 2005 – December 31, 2005 | Maximum Contaminant Level Violation, Average | TTHM | Health-based | Resolved |
| July 1, 2003 – July 31, 2003 | Monitoring, Routine Major (TCR) | Coliform (TCR) | — | Resolved |
Resolved addressed and confirmed by the state
Enforcement actions
- August 31, 2003State Compliance achieved13 linked violations
- January 14, 2002State Formal Notice of Violation issued5 linked violations
- January 29, 1996State Formal Notice of Violation issued10 linked violations
Common questions
Is U.S.N., SAN NICOLAS ISLAND required to publish a Consumer Confidence Report?
- Yes. U.S.N., SAN NICOLAS ISLAND is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.
When is U.S.N., SAN NICOLAS ISLAND’s next Consumer Confidence Report due?
- U.S.N., SAN NICOLAS ISLAND’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does U.S.N., SAN NICOLAS ISLAND have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for U.S.N., SAN NICOLAS ISLAND.
What is a Consumer Confidence Report?
- A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.
Contact
JACOBSEN, NATHAN
805-989-3041
POINT MUGU, CA 93042